#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Configuration file for the Sphinx documentation builder.
#
# This file only contains a selection of the most common options. For a full
# list see the documentation:
# http://www.sphinx-doc.org/en/master/config

# -- Path setup --------------------------------------------------------------

# If extensions (or modules to document with autodoc) are in another directory,
# add these directories to sys.path here. If the directory is relative to the
# documentation root, use os.path.abspath to make it absolute, like shown here.
#
import os
import subprocess
import sys
sys.path.insert(0, os.path.abspath('../../'))

import inspect
import hiq

# -- General declarations ----------------------------------------------------

# Mock
autodoc_mock_imports = [
    "hiq.projectq.backends._sim._cppsim_mpi",
    "hiq.projectq.backends._sim._cppstabsim",
    "hiq.projectq.cengines._sched_cpp",
    "mpi4py","pybind11"]

on_rtd = os.environ.get('READTHEDOCS', None) == 'True'

if on_rtd:
    subprocess.call('cd ..; doxygen', shell=True)


# -- Project information -----------------------------------------------------

project = 'Huawei HiQ'
copyright = '2019, Huawei HiQ'
author = 'Huawei HiQ developers'

# -- General configuration ---------------------------------------------------

# Add any Sphinx extension module names here, as strings. They can be
# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
# ones.
import sphinx_rtd_theme

extensions = [
    'sphinx.ext.autodoc', 'sphinx.ext.napoleon', 'sphinx.ext.mathjax',
    'sphinx.ext.autosummary', 'sphinx.ext.linkcode', 'breathe'
]

autosummary_generate = True

# Add any paths that contain templates here, relative to this directory.
templates_path = ['_templates']

# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.
# This pattern also affects html_static_path and html_extra_path.
exclude_patterns = []

# The suffix(es) of source filenames.
# You can specify multiple suffix as a list of string:
#
# source_suffix = ['.rst', '.md']
source_suffix = '.rst'

# The master toctree document.
master_doc = 'index'

# The version info for the project you're documenting, acts as replacement for
# |version| and |release|, also used in various other places throughout the
# built documents.
#
# The short X.Y version.

# This reads the __version__ variable from ../_version.py
exec(open('../../_version.py').read())

version = __version__
# The full version, including alpha/beta/rc tags.
release = __version__

# The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages.
#
# This is also used if you do content translation via gettext catalogs.
# Usually you set "language" from the command line for these cases.
language = None

# There are two options for replacing |today|: either, you set today to some
# non-false value, then it is used:
#
# today = ''
#
# Else, today_fmt is used as the format for a strftime call.
#
# today_fmt = '%B %d, %Y'

# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.
# This patterns also effect to html_static_path and html_extra_path
exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store', 'README.rst']

# The reST default role (used for this markup: `text`) to use for all
# documents.
#
# default_role = None

# If true, '()' will be appended to :func: etc. cross-reference text.
#
# add_function_parentheses = True

# If true, the current module name will be prepended to all description
# unit titles (such as .. function::).
#
# add_module_names = True

# If true, sectionauthor and moduleauthor directives will be shown in the
# output. They are ignored by default.
#
# show_authors = False

# The name of the Pygments (syntax highlighting) style to use.
pygments_style = 'sphinx'

# A list of ignored prefixes for module index sorting.
# modindex_common_prefix = []

# If true, keep warnings as "system message" paragraphs in the built documents.
# keep_warnings = False

# If true, `todo` and `todoList` produce output, else they produce nothing.
todo_include_todos = False

# -- Options for C++ documentation

breathe_projects = { 'HiQSimulator': '../xml' }
highlight_language = 'c++'

# -- Options for HTML output -------------------------------------------------

# The theme to use for HTML and HTML Help pages.  See the documentation for
# a list of builtin themes.
#
html_theme = 'sphinx_rtd_theme'

# Theme options are theme-specific and customize the look and feel of a theme
# further.  For a list of options available for each theme, see the
# documentation.
#
# html_theme_options = {}

# Add any paths that contain custom themes here, relative to this directory.
# html_theme_path = []

# The name for this set of Sphinx documents.
# "<project> v<release> documentation" by default.
#
# html_title = 'hiq v1'

# A shorter title for the navigation bar.  Default is the same as html_title.
#
# html_short_title = None

# The name of an image file (relative to this directory) to place at the top
# of the sidebar.
#
# html_logo = None

# The name of an image file (relative to this directory) to use as a favicon of
# the docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x
# 32 pixels large.
#
# html_favicon = None

# Add any paths that contain custom static files (such as style sheets) here,
# relative to this directory. They are copied after the builtin static files,
# so a file named "default.css" will overwrite the builtin "default.css".
# html_static_path = ['_static']

# Add any extra paths that contain custom files (such as robots.txt or
# .htaccess) here, relative to this directory. These files are copied
# directly to the root of the documentation.
#
# html_extra_path = []

# If not None, a 'Last updated on:' timestamp is inserted at every page
# bottom, using the given strftime format.
# The empty string is equivalent to '%b %d, %Y'.
#
# html_last_updated_fmt = None

# If true, SmartyPants will be used to convert quotes and dashes to
# typographically correct entities.
#
# html_use_smartypants = True

# Custom sidebar templates, maps document names to template names.
#
# html_sidebars = {}

# Additional templates that should be rendered to pages, maps page names to
# template names.
#
# html_additional_pages = {}

# If false, no module index is generated.
#
# html_domain_indices = True

# If false, no index is generated.
#
# html_use_index = True

# If true, the index is split into individual pages for each letter.
#
# html_split_index = False

# If true, links to the reST sources are added to the pages.
#
# html_show_sourcelink = True

# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
#
# html_show_sphinx = True

# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
#
# html_show_copyright = True

# If true, an OpenSearch description file will be output, and all pages will
# contain a <link> tag referring to it.  The value of this option must be the
# base URL from which the finished HTML is served.
#
# html_use_opensearch = ''

# This is the file name suffix for HTML files (e.g. ".xhtml").
# html_file_suffix = None

# Language to be used for generating the HTML full-text search index.
# Sphinx supports the following languages:
#   'da', 'de', 'en', 'es', 'fi', 'fr', 'h', 'it', 'ja'
#   'nl', 'no', 'pt', 'ro', 'r', 'sv', 'tr', 'zh'
#
# html_search_language = 'en'

# A dictionary with options for the search language support, empty by default.
# 'ja' uses this config value.
# 'zh' user can custom change `jieba` dictionary path.
#
# html_search_options = {'type': 'default'}

# The name of a javascript file (relative to the configuration directory) that
# implements a search results scorer. If empty, the default will be used.
#
# html_search_scorer = 'scorer.js'

# Output file base name for HTML help builder.
htmlhelp_basename = 'hiqdoc'

# ----------------------------------------------------------------------------


# -- Options for LaTeX output ---------------------------------------------

latex_elements = {
    # The paper size ('letterpaper' or 'a4paper').
    #
    # 'papersize': 'letterpaper',

    # The font size ('10pt', '11pt' or '12pt').
    #
    # 'pointsize': '10pt',

    # Additional stuff for the LaTeX preamble.
    #
    # 'preamble': '',

    # Latex figure (float) alignment
    #
    # 'figure_align': 'htbp',
}

# Grouping the document tree into LaTeX files. List of tuples
# (source start file, target name, title,
#  author, documentclass [howto, manual, or own class]).
latex_documents = [
    (master_doc, 'HuaweiHiQ.tex', 'Huawei HiQ Documentation',
     'a', 'manual'),
]

# The name of an image file (relative to this directory) to place at the top of
# the title page.
#
# latex_logo = None

# For "manual" documents, if this is true, then toplevel headings are parts,
# not chapters.
#
# latex_use_parts = False

# If true, show page references after internal links.
#
# latex_show_pagerefs = False

# If true, show URL addresses after external links.
#
# latex_show_urls = False

# Documents to append as an appendix to all manuals.
#
# latex_appendices = []

# It false, will not define \strong, \code,     itleref, \crossref ... but only
# \sphinxstrong, ..., \sphinxtitleref, ... To help avoid clash with user added
# packages.
#
# latex_keep_old_macro_names = True

# If false, no module index is generated.
#
# latex_domain_indices = True


# -- Options for manual page output ---------------------------------------

# One entry per manual page. List of tuples
# (source start file, name, description, authors, manual section).
man_pages = [
    (master_doc, 'Huawei HiQ', 'Huawei HiQ Documentation',
     [author], 1)
]

# If true, show URL addresses after external links.
#
# man_show_urls = False


# -- Options for Texinfo output -------------------------------------------

# Grouping the document tree into Texinfo files. List of tuples
# (source start file, target name, title, author,
#  dir menu entry, description, category)
texinfo_documents = [
    (master_doc, 'Huawei HiQ', 'Huawei HiQ Documentation',
     author, 'Huawei HiQ', 'High-performance quantum computing simulator and programming framework.',
     'Miscellaneous'),
]

# Documents to append as an appendix to all manuals.
#
# texinfo_appendices = []

# If false, no module index is generated.
#
# texinfo_domain_indices = True

# How to display URL addresses: 'footnote', 'no', or 'inline'.
#
# texinfo_show_urls = 'footnote'

# If true, do not generate a @detailmenu in the "Top" node's menu.
#
# texinfo_no_detailmenu = False

# -- Options for sphinx.ext.linkcode --------------------------------------

def linkcode_resolve(domain, info):
    # Copyright 2018 ProjectQ (www.projectq.ch), all rights reserved.
    on_rtd = os.environ.get('READTHEDOCS') == 'True'
    github_url = "https://github.com/Huawei-HiQ/HiQsimulator/tree/"
    if on_rtd:
        rtd_tag = os.environ.get('READTHEDOCS_VERSION')
        if rtd_tag == 'latest':
            github_tag = 'master'
        else:
            # RTD changes "/" in branch name to "-"
            # As we use branches like fix/cool-feature, this is a
            # problem -> as a fix we require that all branch names
            # which contain a '-' must first contain one '/':
            if list(rtd_tag).count('-'):
                github_tag = list(rtd_tag)
                github_tag[github_tag.index('-')] = '/'
                github_tag = ''.join(github_tag)
            else:
                github_tag = rtd_tag
    else:
        github_tag = 'v' + __version__
    if domain != 'py':
        return None
    else:
        try:
            obj = eval(info['module'] + '.' + info['fullname'])
        except AttributeError:
            # Object might be a non-static attribute of a class, e.g.,
            # self.num_qubits, which would only exist after init was called.
            # For the moment we don't need a link for that as there is a link
            # for the class already
            return None
        try:
            filepath = inspect.getsourcefile(obj)
            line_number = inspect.getsourcelines(obj)[1]
        except:
            # obj might be a property or a static class variable, e.g.,
            # loop_tag_id in which case obj is an int and inspect will fail
            try:
                # load obj one hierarchy higher (either class or module)
                new_higher_name = info['fullname'].split('.')
                if len(new_higher_name) <= 1:
                    obj = eval(info['module'])
                else:
                    obj = eval(info['module'] + '.' +
                               '.'.join(new_higher_name[:-1]))
                filepath = inspect.getsourcefile(obj)
                line_number = inspect.getsourcelines(obj)[1]
            except:
                return None
        # Only require relative path project/relative_path
        project_path = hiq.__path__.__dict__["_path"][0]
        relative_path = os.path.relpath(filepath, project_path)
        url = (github_url + github_tag + "/hiq/" + relative_path + "#L" +
               str(line_number))
        return url
